Front

What determines a mineral's physical properties?

Back

The arrangement of atoms in the mineral.

Front

What is the typical hardness range of the mineral pyroxene?

Back

5 to 6 on the Mohs scale.

Front

Why do quartz and halite have different crystal shapes?

Back

Because of the internal arrangement of their atoms.

Front

What are the two minerals that are commercial sources of iron?

Back

Hematite and magnetite.

Front

What is the significance of a mineral's crystal structure?

Back

It influences the mineral's physical properties, such as hardness and cleavage.

Front

What is the Mohs scale used for?

Back

To measure the hardness of minerals.

Front

What is the chemical composition of quartz?

Back

SiO2 (silicon dioxide).

Front

What is the difference between a mineral and a rock?

Back

A mineral is a naturally occurring inorganic solid with a definite chemical composition and crystalline structure, while a rock is a solid aggregate of one or more minerals.

Front

What is cleavage in minerals?

Back

The tendency of a mineral to break along flat surfaces.

Front

What is the role of iron in mineral formation?

Back

Iron is a key element in the formation of many minerals, particularly those that are sources of iron ore.